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Finding the Fourth Proportional to 677.91, 936.18 and 579.09

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Solution

The fourth proportional to 677.91, 936.18 and 579.09 is: 799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.91 : 936.18 = 579.09 : x
  2. Step 2: Convert to fraction form
    677.91/936.18 = 579.09/x
  3. Step 3: Cross multiply
    677.91x = 936.18 × 579.09
  4. Step 4: Simplify right side
    677.91x = 542,132.48
  5. Step 5: Solve for x
    x = 542,132.48/677.91
  6. Step 6: Final answer
    x = 799.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.